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- Fabes 1913-1923? (5, 156) obsolete by 1923
- Ribes uva-crispa L. var. sativum DC. [also reported as: Grossularia reclinata (L.) P. Mill. Ribes grossularia L.]
- Fagara (French)
- 1785 (8)
- Zanthoxylum L. [reported as: Zanthoxylum (Catesby) L.]
- 1785 (8)
- Zanthoxylum americanum P. Mill. [reported as: Zanthoxylum fraxinifolium]
- Faggina (Italian) 1879-1886 (46, 110)
- Fagopyrum esculentum Moench[reported as: Polygonum fagopyrum L.]
- Fagiolo (Italian) 1886 (110)
- Possibly Phaseolus vulgaris L. [reported as: Phaseolus vulgaris Savi]
- Fagiuolo (Italian) 1919 (107)
- Phaseolus vulgaris L.
- Fairy bells 1903-1923 (5, 69, 156)
- Digitalis pupurea L.
- Fairy cap 1903-1923 (5, 69, 156)
- Digitalis pupurea L.
- Fairy fingers 1876-1913 (5, 69, 92)
- Digitalis pupurea L.
- Fairy gloves [Fairy glove, Fairy's glove] 1898-1923 (5, 92, 156)
- Digitalis pupurea L.
- Fairy slipper
- Present (50)
- Calypso Salisb.
- Present (50)
- Calypso bulbosa (L.) Oakes
- Present (50)
- Calypso bulbosa (L.) Oakes var. americana (R. Br. ex Ait. f.) Luer
- Fairy thimbles 1903-1913 (5, 69)
- Digitalis pupurea L.
- Fairy weed 1913 (5)
- Digitalis pupurea L.
- Fairybells [Fairy bells]
- 1923-Present (50, 138, 155, 156)
- Disporum Salisb. ex D. Don
- 1977 (3)
- Disporum trachycarpum (S. Wats.) Benth. & Hook. f. [reported as: Disporum trachycarpon (Wats.) Benth. & Hook.]
- Fairy-cheese [Fairy cheeses, Fairy-cheeses] 1900-1929 (5, 106, 156, 157, 158)
- Malva rotundifolia L.
- Fairy-circle [Fairy circle] 1892-1929 (73, 157, 158) E. Mass
- Juniperus communis L.
- Fairy-smoke [Fairy smoke] 1892-1923? (5, 75, 156, 157, 158) Deering ME obsolete by 1923
- Monotropa uniflora L.
- Fairy-swords [Fairyswords] Present (50)
- Cheilanthes lindheimeri (Sm.) Hook.
- Fairy-table 1900 (158)
- Hydrocotyle L.
- Faitour's-grass [Faitour's grass]
- 1900-1923 (156, 158)
- Euphorbia esula L.
- 1913 (5)
- Euphorbia esula L. var. esula [reported as: Tithymalus esula (L.) Hjill.]
- Fajol (Spanish) 1879? (46)
- Fagopyrum esculentum Moench[reported as: Polygonum fagopyrum L.]
- Falcaria Present (50)
- Falcaria Fabr.
- Fall gramma grass 1923 (99) OK
- Bouteloua curtipendula (Michx.) Torr. var. curtipendula [reported as: Atheropogon curtipendulus (Michx.) Fourn.]
- Fall lettuce 1923 (156)
- Lactuca canadensis L.
- Fall marsh grass 1923 (99) OK
- Spartina pectinata Bosc ex Link [reported as: Spartina michauxiana Hitchc.]
- Fall panic grass [Fall panicgrass]
- Present (50)
- Panicum dichotomiflorum Michx.
- Present (50)
- Panicum dichotomiflorum Michx.var. dichotomiflorum
- Fall panicum 1937-1977 (3, 122, 155)
- Panicum dichotomiflorum Michx.
- Fall phlox 1977-Present (3, 4, 50)
- Phlox paniculata L.
- Fall prairie thistle 1852 (47)
- Cirsium altissimum (L.) Hill [reported as: Cirsium altissimum (L.) Spreng]
- Fall redtop [Fall red-top] 1923 (99) OK
- Tridens flavus (L.) A.S. Hitchc. [reported as: > Tridens flava ]
- Fall rosette grass Present (50)
- Dichanthelium wilcoxianum (Vasey) Freckmann
- Fall witch grass [Fall witchgrass, Fall witch-grass]
- 1932 (1)
- Digitaria Haller [reported as: Leptoloma Chase]
- 1901 (94)
- Digitaria cognata (J.A. Schultes) Pilger [reported as: Panicum cognatum Schultes]
- 1852-1977 (3, 122, 155, 163)
- Digitaria cognata (J.A. Schultes) Pilger var. cognata [also reported as: Leptoloma cognatum (Schult.) Chase]
- Fallflower [Fall flower, Fall-flower] 1900-1923 (5, 156, 158)
- Symphyotrichum ericoides (L.) Nesom var. ericoides [also reported as: Aster multiflorus Aiton]
- Falsche Acacien (German) 1892 (6)
- Robinia pseudoacacia L. [reported as: Robinia pseudacacia L., Robinia pseudo-acacia L.]
- Falsche Acazie (German) 1900 (158)
- Robinia pseudoacacia L. [reported as: Robinia pseudacacia L., Robinia pseudo-acacia L.]
- Falscher safran (German) 1900 (158)
- Carthamus tinctorius L.
- False acacia 1840-1936 (2, 5, 6, 14, 19, 49, 63, 82, 93, 106, 107, 156, 157, 158)
- Robinia pseudoacacia L. [also reported as: Robinia pseudacacia L., Robinia pseudo-acacia L.]
- False alkanet 1923 (156)
- Buglossoides arvensis (L.) I.M. Johnston [reported as: Lithospermum arvense L.]
- False anemone
- 1923 (156)
- Enemion Raf. [reported as: Isopyrum L.]
- 1923 (156)
- Enemion biternatum Raf. [reported as: Isopyrum biternatum (Raf.) Torr. & Gray]
- False anise 1933 (127) ND
- Agastache foeniculum (Pursh) Kuntze[reported as: Agastache anethiodora (Nutt.) Britton]
- False aster 1840-1933 (19, 127) ND
- Boltonia asteroides (L.) L'Hér.
- False balm 1937 (97) OK
- Monarda clinopodioides Gray
- False banana 1900-1929 (5, 156, 157, 158)
- Asimina triloba (L.) Dunal [also reported as: Asimina triloba Dunal.]
- False bark-tree 1814 (167)
- Iva L.
- False beechdrops [False beech drops, False beech-drops] 1840-1923 (2, 5, 19, 92, 156)
- Monotropa hypopithys L. [also reported as: Hypopitys americana (DC.) Small, Montropa hypopitys L., Monotropa lanuginosa Michx.]
- False bindweed Present (50)
- Calystegia R. Br.
- False bittersweet [False bitter sweet, False bitter-sweet] 1840-1949 (5, 19, 48, 49, 57, 58, 61, 92, 109, 135, 156, 157)
- Celastrus scandens L.
- False boneset
- 1900-1986 (1, 4, 93, 158)
- Brickellia Ell.[also reported as: Kuhnia L.]
- Present (50)
- Brickellia eupatorioides (L.) Shinners
- Present (50)
- Brickellia eupatorioides (L.) Shinners var. chlorolepis (Woot. & Standl.) B.L. Turner
- 1926-Present (3, 50, 98)
- Brickellia eupatorioides (L.) Shinners var. corymbulosa (Torr. & Gray) Shinners [also reported as: Kuhnia eupatorioides L. var. corymbulosa Torr. & Gray]
- 1840-Present (5, 19, 50, 72, 82, 85, 92, 93, 95, 97, 122, 124, 156)
- Brickellia eupatorioides (L.) Shinners var. eupatorioides [also reported as: Kuhnia eupatorioides L., Kuhnia glutinosa Ell.]
- Present (50)
- Brickellia eupatorioides (L.) Shinners var. texana (Shinners) Shinners
- False box 1840-1913 (5, 19, 92)
- Cornus florida L. [also reported as: Cynoxylon floridum (L.) Raf.]
- False boxwood [False box wood, False box-wood] 1913-1923 (5, 156)
- Cornus florida L. [also reported as: Cynoxylon floridum (L.) Raf.]
- False broomweed
- 1986-Present (4, 50)
- Haploesthes Gray
- Present (50)
- Haploesthes greggii Gray
- False buckwheat
- 1936 (93) Neb
- Polygonum L. [reported as: Tiniaria Webb & Moq.]
- 1900-1986 (4, 158)
- Polygonum scandens L.
- 1932 (1, 85) SD
- Polygonum scandens L. var. scandens [also reported as: Bilderdykia scandens (L.) Greene]
- False buffalo grass [False buffalo-grass, False buffalograss]
- 1932-Present (1, 50, 93)
- Monroa Torr.
- 1852-Present (3, 5, 11, 50, 75, 85, 94, 122, 129, 140, 145, 152, 155, 163)
- Monroa squarrosa (Nutt.) Torr.
- 1915 (111) Neb
- Muhlenbergia richardsonis (Trin.) Rydb. [reported as: Muhlenbergia squarrosa (Trin.) Rydb.]
- False bugloss 1840 (19)
- Lithospermum canescens (Michx.) Lehm. [reported as: Batschia canescens]
- False buttonweed Present (50)
- Spermacoce L.
- False calais
- 1900 (158)
- Nothocalais (Gray) Greene
- 1899-1907 (72, 131) IA SD
- Nothocalais cuspidata (Pursh) Greene [also reported as: Troximon cuspidatum Pursh]
- False chamomile [False-chamomile]
- 1840-1923 (19, 156)
- Boltonia asteroides (L.) L'Hér.
- 1923 (138)
- Matricaria L.
- 1986 (4)
- Matricaria recutita L. [reported as: Matricaria chamomila L.]
- False cloak fern
- Present (50)
- Argyrochosma (Sm.) Windham
- 1986 (4)
- Argyrochosma dealbata (Pursh) Windham [reported as: Notholaena dealbata (Pursh) Kunze]
- False cohosh 1840 (19)
- Caulophyllum thalictroides (L.) Michx.
[reported as: Leontice thalictroides L.]
- False coltsfoot [False colt's-foot, False colt's foot] 1840-1923 (5, 19, 64, 92, 156, 158)
- Asarum canadense L.
- False couch grass 1901-1913 (5, 56, 94) IA
- Elymus ×pseudorepens (Scribn. & J.G. Sm.) Barkworth & D.R. Dewey [lanceolatus × trachycaulus] [also reported as: Agropyron pseudo-repens Scribn. & Sm.]
- False cowslip 1840 (19)
- Dodecatheon meadia L.
- False crawley 1876-1923 (92, 156, 158)
- Pterospora andromedea Nutt.
- False cress 1923 (156)
- Thlaspi arvense L.
- False crowfoot 1923 (156)
- Asarum canadense L.
- False daisy Present (50)
- Eclipta prostrata (L.) L.
- False dandelion
- 1923-1986 (4, 156)
- Agoseris Raf.
- 1923-1977 (3, 127, 156)
- Agoseris glauca (Pursh) Raf. [also reported as: Agoseris glauca (Pursh) D. Dietr.]
- 1913 (5)
- Krigia biflora (Walt.) Blake var. biflora [reported as: Cynthia virginica (L.) D. Don.]
- 1900 (158)
- Nothocalais (Gray) Greene
- 1911-1977 (3, 5, 85, 93, 95, 98)
- Nothocalais cuspidata (Pursh) Greene [also reported as: Agoseris cuspidata (Pursh) D. Dietr., Microseris cuspidata(Pursh) Sch. Bip.]
- 1895-1986 (1, 2, 4, 158)
- Pyrrhopappus DC. [also reported as: Sitilias Raf.]
- 1929-1977 (3, 157)
- Pyrrhopappus carolinianus (Walt.) DC.
- False dog-fennel [False dog fennel, False dogfennel]
- 1900-1937 (5, 97, 122, 156, 158)
- Dyssodia papposa (Vent.) A.S. Hitchc. [also reported as: Boebera papposa (Vent.) Rydb.]
- Present (50)
- Dyssodia tagetoides Torr. & Gray
- False dragonhead [False-dragonhead, False dragon's head, False dragonshead]
- 1932 (1)
- Dracocephalum L. [reported as: Dracocephalum (Tourn.) L.]
- 1895-1986 (2, 4, 138)
- Physostegia Benth.
- 1986 (4)
- Physostegia angustifolia Fern.
- 1899-1977 (3, 63, 72, 82, 131, 156, 158)
- Physostegia virginiana (L.) Benth.
- False dropseed 1840 (19)
- Brachyelytrum septentrionale (Babel) G. Tucker [reported as: Brachyelytrum erectum (Schreb.) Beauv.]
- False eglantine, possibly 1649 (46)
- Rosa carolina L.
- False elm 1900 (5, 156, 158)
- Celtis occidentalis L.
- False feverfew [False fever-few] 1814 (167)
- Parthenium L.
- False flax [Falseflax]
- 1900-Present (1, 4, 50, 93, 155, 156, 158)
- Camelina Crantz [also reported as: Camelina Crantz]
- 1895-1932 (5, 15, 70, 72, 80, 85, 97, 107, 131, 145, 156, 157, 158)
- Camelina sativa (L.) Crantz
- 1876-1932 (5, 92, 156, 158)
- Lepidium campestre (L.) Aiton f. [also reported as: Lepidium campestre (L.) R. Br., Thlaspi campestre]
- 1892 (6)
- Linaria vulgaris P. Mill. [reported as: Linaria vulgaris Hill]
- False foxglove
- Present (50)
- Agalinis Raf.
- 1932-Present (1, 4, 50)
- Aureolaria Raf.
- 1900 (158)
- Dasistoma Raf.
- False garlic [Falsegarlic] 1932-Present (1, 50, 155)
- Nothoscordum Kunth.
- False gaura Present (50)
- Stenosiphon linifolius (Nutt. ex James) Heynh.
- False gentian 1923 (156)
- Gentianella amarella (L.) Boerner ssp. acuta (Michx.) J. Gillett [reported as: Gentiana amarella L. var. acuta]
- False golden-aster [False goldenaster] Present (50)
- Heterotheca Cass.
- False goldenweed Present (50)
- Oonopsis Nutt.
- False grape [False grapes] 1840-1929 (5, 6, 19, 37, 49, 58, 92, 156, 157, 158)
- Parthenocissus quinquefolia (L.) Planch. [also reported as: Ampelopsis quinquefolia Michx.]
- False grass 1913 (5)
- Leersia oryzoides (L.) Sw. [reported as: Homalocenchrus oryzoides (L.) Poll.]
- False gromwell
- 1895-1986 (1, 2, 4, 82, 156, 158)
- Onosmodium Michx.
- 1930 (82) IA
- Onosmodium molle Michx.
- 1977 (3)
- Onosmodium molle Michx.ssp. hispidissimum (Mackenzie) Boivin
- 1932-1977 (3, 85)
- Onosmodium molle Michx.ssp. occidentale (Mackenzie) Cochrane [also reported as: Onosmodium occidentale Mackenzie]
- False Guinea grass 1884 (87)
- Sorghum halepense (L.) Pers.
- False heather
- 1900 (158)
- Hudsonia L.
- 1900-1923 (5, 156, 158)
- Hudsonia tomentosa Nutt.
- False hedge-hyssop [False hedge hyssop] 1840 (19)
- Lindernia dubia (L.) Pennell var. dubia
[reported as: Ilysanthes attenuata (Spreng.) Small]
- False hemp
- 1923 (156)
- Galeopsis bifida Boenn. [reported as: Galeopsis tetrahit L.]
- 1840-1876 (19, 92)
- Rhus hirta (L.) Sudworth [also reported as: Datisca hirta L.]
- False horehound [False hoarhound] 1840-1923 (19, 156)
- Ballota nigra L.
- False hyacinth 1923 (156)
- Camassia scilloides (Raf.) Cory [reported as: Camassia esculenta Lindl.]
- False indigo [False-indigo]
- 1895 (1, 2, 50, 93, 106, 138, 158)
- Amorpha L.
- 1893 (22)
- Amorpha canescens Pursh
- 1873-1986 (3, 4, 5, 9, 37, 63, 72, 82, 85, 93, 95, 97, 106, 112, 113, 114, 130, 131, 156, 157, 158)
- Amorpha fruticosa L.
- 1899-1986 (2, 4, 63, 82, 125)
- Baptisia Vent.
- 1876-1900 (92, 156, 158)
- Baptisia australis (L.) R. Br. ex Aiton f.
- False ipecac 1892 (6)
- Triosteum perfoliatum L.
- False jalap 1828 (7)
- Mirabilis L.
- False jessamine 1923 (156)
- Lycium barbarum L. [reported as: Lycium halimifolium P. Mill.]
- False lettuce
- 1913-1932 (5, 85) SD
- Lactuca floridana (L.) Gaertn.
- 1913 (5)
- Lactuca floridana (L.) Gaertn. var. villosa (Jacq.) Cronq. [reported as: Lactuca villosa Jacq.]
- False lily-of-the-valley
- 1949 (109)
- Maianthemum G.H. Weber ex Wiggers
- 1900-1933 (5, 127, 158)
- Maianthemum canadense Desf. [also reported as: Unifolium canadense (Desf.) Greene]
- False loosestrife [False loose-strife]
- 1895-1986 (1, 2, 4, 93, 106, 156, 158)
- Ludwigia L. [also reported as:Ludvigia]
- 1900-1929 (5, 156, 157, 158)
- Ludwigia palustris (L.) Ell. [also reported as: Isnardia palustris L.]
- 1913-1923 (5, 156)
- Ludwigia polycarpa Short & Peter
- False lupine
- 1900 (158)
- Thermopsis R. Br. ex Aiton f.
- 1913-1933 (5, 37, 126)
- Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards. [also reported as: Thermopsis rhombifolia (Nutt.) Richards]
- False madwort Present (50)
- Berteroa DC.
- False mallow [False-mallow, Falsemallow]
- 1895-Present (2, 4, 15, 50, 93)
- Malvastrum Gray
- 1876-1923 (5, 92, 156)
- Sida spinosa L.
- 1900-1949 (109, 155, 158)
- Sphaeralcea St. Hill.
- 1929-1933 (127, 157)
- Sphaeralcea coccinea (Nutt.) Rydb. ssp. coccinea [also reported as: Malvastrum coccineum (Pursh) Gray]
- False mayweed Present (50)
- Tripleurospermum maritima (L.) W.D.J. Koch ssp. maritima
- False meadow rue 1930 (82) IA
- Enemion biternatum Raf. [reported as: Isopyrum biternatum (Raf.) Torr. & Gray]
- False melic [Falsemelic]
- Present (50)
- Schizachne Hack.
- 1942-Present (3, 50, 140, 155)
- Schizachne purpurascens (Torr.) Swall.
- False mesquite grass 1884 (87)
- Buchloe dactyloides (Nutt.) Engelm.
- False mistletoe 1895-1923 (2, 156)
- Phoradendron leucarpum (Raf.) Reveal & M.C. Johnston [also reported as: Phoradendron flavescens Nutt.]
- False motherwort 1840 (19)
- Ballota nigra L.
- False mustard 1828-1929 (5, 7, 19, 92, 156, 157, 158)
- Polanisia dodecandra (L.) DC. ssp. dodecandra [also reported as: Polanisia graveolens Raf.]
- False needle grass [False needle-grass]
- 1912 (152) NM
- Aristida L.
- 1852-1912 (152, 163) NM
- Scleropogon Phil. [also reported as: Schleropogon]
- False nettle [Falsenettle]
- 1895-Present (1, 2, 50, 93, 155, 156)
- Boehmeria Jacq.
- 1907-1986 (4, 5, 72, 93, 95, 122, 156)
- Boehmeria cylindrica (L.) Sw.
- 1928 (40)
- Laportea canadensis (L.) Weddell [reported as: Urticastrum divaricatum (L.) Kuntze]
- 1923 (156)
- Pilea pumila (L.) Gray
- False nut-grass [False nutgrass] 1977 (3)
- Cyperus strigosus L.
- False oat [False oats] 1932-1936 (1, 93, 152) Neb NM
- Trisetum Pers.
- False oat grass [False oat-grass] 1896-1913 (5, 45, 56, 68) IA Ottawa
- Arrhenatherum elatius (L.) Beauv. ex J. Presl & C. Presl. [also reported as: Arrhenatherum avenaceum Beauv.]
- False pennyroyal [Falsepennyroyal]
- 1942-Present (50, 155)
- Hedeoma Pers.
- 1937 (124) TX
- Hedeoma drummondii Benth.
- 1895-1942 (2, 155, 156, 158)
- Isanthus Michx.
- 1900-1986 (3, 4, 5, 72, 85, 93, 97, 122, 156, 158)
- Isanthus brachiatus (L.) B.S.P. [also reported as: Trichostema brachiatum L.]
- 1923 (156)
- Trichostema dichotomum L. [reported as: Trichostema dichotoma ]
- False pimpernel [Falsepimpernel , False pempernel]
- 1932 (1)
- Anagallis L. [reported as: Centunculus L.]
- 1913-1937 (5, 97, 122, 156)
- Anagallis minima (L.) Krause [also reported as: Centunculus minimus L.]
- 1895-Present (1, 2, 50, 155, 158)
- Lindernia All. [also reported as: Ilyanthes Raf., Ilysanthes Raf.]
- 1900-1986 (3, 4, 131) SD
- Lindernia dubia (L.) Pennell [also reported as: Ilysanthes gratioloides (L.) Benth.]
- 1977 (3)
- Lindernia dubia (L.) Pennell var. anagallidea (Michx.) Cooperrider [reported as: Lindernia anagallidea (Michx.) Pennell]
- 1911-1936 (93, 95, 156) Neb
- Lindernia dubia (L.) Pennell var. dubia [also reported as: Ilysanthes dubia (L.) Barnhart]
- False pondweed [False pond-weed] 1840 (19)
- Zannichellia palustris L. [reported as: Zannichellia intermedia T.]
- False quackgrass 1942-1944 (140, 155) CO
- Elymus ×pseudorepens (Scribn. & J.G. Sm.) Barkworth & D.R. Dewey [lanceolatus × trachycaulus] [also reported as: Agropyron pseudorepens Scribn. & Sm.]
- False red mallow 1932 (85) SD
- Sphaeralcea coccinea (Nutt.) Rydb.
- False redtop [False red top, False red-top]
- 1913 (5)
- Eragrostis pectinacea (Michx.) Nees ex Steud.
- 1938 (119) OK
- Eragrostis spectabilis (Pursh) Steud.
- 1894 (129) SD
- Panicum virgatum L.
- 1876-1913 (2, 5, 45, 66, 68, 72, 90, 92, 129)
- Poa palustris L. [also reported as: Poa flava L., Poa serotina Ehrh., Poa triflora Gilib.]
- 1932 (134) KS
- Tridens flavus (L.) A.S. Hitchc. var. flavus [reported as: Triodia flava (L.) Hitchc.]
- False rice 1885-1903 (66, 87, 88, 90)
- Leersia oryzoides (L.) Sw.
- False rocket
- 1849-1900 (13, 158)
- Iodanthus Torr. & Gray
- 1913-1923 (5, 156)
- Iodanthus pinnatifidus (Michx.) Steud.
- False rue-anemone [False rue anemone]
- 1900-Present (50, 158)
- Enemion Raf. [also reported as: Isopyrum L.]
- 1907-1986 (1, 4, 5, 72, 97)
- Enemion biternatum Raf. [also reported as: Isopyrum biternatum (Raf.) Torr. & Gray]
- False saffron
- 1932 (1)
- Carthamus L.
- 1840-1949 (19, 49, 92, 107, 109, 158)
- Carthamus tinctorius L.
- False salsify 1986 (4)
- Scorzonera L.
- False sarsaparilla
- 1869-1929 (5, 49, 57, 58, 92, 156, 157, 158)
- Aralia nudicaulis L.
- 1923 (156)
- Smilax glauca Walt.
- False Solomon's seal [False Solomonseal, False Solomons-seal]
- 1895-1949 (2, 109, 138, 155, 156)
- Maianthemum G.H. Weber ex Wiggers [also reported as: Smilacina Desf.]
- 1900-1970 (40, 121, 138, 156, 157, 158)
- Maianthemum racemosum (L.) Link ssp. racemosum [also reported as: Smilacina racemosa (L.) Desf., Vagnera racemosa (L.) Morong.]
- 1913-1932 (5, 85, 156) SD
- Maianthemum stellatum (L.) Link [also reported as: Smilacina stellata (L.) Desf., Vagnera stellata (L.) Morong.]
- False spikenard 1879-1977 (3, 5, 46, 65, 85, 93, 97, 107, 158)
- Maianthemum racemosum (L.) Link ssp. racemosum [also reported as: Smilacina racemosa (L.) Desf., Vagnera racemosa (L.) Morong.]
- False starwort 1923 (156)
- Boltonia asteroides (L.) L'Hér.
- False strawberry 1913 (80) IA
- Potentilla norvegica L. ssp. monspeliensis (L.) Aschers. & Graebn. [reported as: Potentilla monspeliensis L.]
- False sunflower [False sun-flower]
- 1814 (167)
- Helenium L.
- 1828-1936 (5, 7, 19, 71, 86, 92, 93, 156, 157, 158)
- Helenium autumnale L.
- 1977-1986 (3, 4)
- Helianthella quinquenervis (Hook.) Gray
- 1900 (158)
- Heliopsis Pers.
- 1923-1986 (4, 5, 156)
- Heliopsis helianthoides (L.) Sweet
- 1911-1986 (4, 5, 62, 93, 95, 156)
- Heliopsis helianthoides (L.) Sweet var. scabra (Dunal) Fern. [also reported as: Heliopsis scabra Dunal.]
- 1814 (167)
- Silphium L.
- False sweet flag [False sweet-flag] 1900-1923 (5, 156, 158)
- Iris pseudacorus L.
- False sycamore 1840-1923 (5, 19, 92, 156, 158)
- Platanus occidentalis L.
- False toadflax [False toad-flax]
- 1923 (156)
- Comandra Nutt.
- 1840-1923 (19, 156)
- Comandra umbellata (L.) Nutt. [also reported as: Thesium corymbulosum Michx., Thesium umbellatum L.]
- False varnish tree, False varnish-tree 1900-1923 (5, 156, 158)
- Ailanthus altissima (Mill) Swingle [also reported as: Ailanthus glandulosa Desf.]
- False vervain 1900-1929 (5, 93, 156, 157, 158) Neb
- Verbena hastata L.
- False virginia creeper 1899 (131) SD
- Parthenocissus quinquefolia (L.) Planch. [reported as: Ampelopsis quinquefolia Michx.]
- False wallflower [False wall flower]
- 1849 (13)
- Erysimum L.
- 1923 (156)
- Erysimum capitatum (Dougl. ex Hook.) Greene var. capitatum [reported as: Erysimum asperum (Nutt.) DC.]
- False wheat 1913 (5)
- Elymus repens (L.) Gould [reported as: Agropyron repens (L.) Beauv.]
- False wintergreen
- 1869-1923 (5, 49, 53, 58, 61, 156, 158)
- Pyrola americana Sweet [also reported as: Pyrola rotundifolia L.]
- 1923 (156)
- Pyrola chlorantha Sw.
- False wormwood 1923 (156)
- Ambrosia artemisiifolia L. [reported as: Ambrosia artemisaefolia L.]
- False-gold groundsel [Falsegold groundsel]
- Present (50)
- Packera pseudaurea (Rydb.) W.A. Weber & A. Löve
- Present (50)
- Packera pseudaurea (Rydb.) W.A. Weber & A. Löve var. semicordata (Mackenzie & Bush) T.M. Barkl., comb. nov. ined.
- False-tarragon sagebrush [Falsetarragon sagebrush] 1942 (155)
- Artemisia dracunculus L. [reported as: Artemisia dracunculoides Pursh]
- Fameflower [Fame flower, Fame-flower]
- 1932-Present (1, 4, 50, 155)
- Talinum Adans.
- 1977-1986 (3, 4)
- Talinum calycinum Engelm.
- Fancy 1900 (158)
- Viola tricolor L.
- Fan-leaf cinquefoil [Fanleaf cinquefoil] 1942 (155)
- Potentilla gracilis Dougl. ex Hook. var. flabelliformis (Lehm.) Nutt. ex Torr. & Gray [reported as: Potentilla fruticosa L. americana]
- Fan-leaf vervain [Fanleaf vervain] 1986-Present (4, 50)
- Verbena plicata Greene
- Fan-petals [Fanpetals] Present (50)
- Sida L.
- Fanweed [Fan-weed] 1923 (156)
- Thlaspi arvense L.
- Fanwort
- Present
- Cabomba Aubl.
- 1923-1986 (3, 4, 156)
- Cabomba caroliniana Gray
- Farbersaflor (German) 1900 (158)
- Carthamus tinctorius L.
- Farewell-summer [Farewell summer]
- 1913-1923 (5, 156)
- Symphyotrichum ericoides (L.) Nesom var. ericoides [also reported as: Aster ericoides L.]
- 1913-1923 (5, 156)
- Symphyotrichum lateriflorum (L.) A.& D. Löve var. lateriflorum [also reported as: Aster hirsuticaulis Lindl., Aster lateriflorus (L.) Britton]
- 1923 (156)
- Symphyotrichum novae-angliae (L.) Nesom [reported as: Aster novae-angliae L.]
- Farkleberry [Farkle-berry]
- 1932 (1)
- Vaccinium L. [reported as: Batodendron Nutt.]
- 1828-Present (2, 5, 7, 19, 50, 92, 106, 155, 156, 158)
- Vaccinium arboreum Marsh. [also reported as: Batodendron arboreum (Marsh.) Nutt.]
- Farmer's-ruin 1900 (158)
- Spergula arvensis L.
- Farouch (French) 1886 (110)
- Trifolium incarnatum L.
- Farradje (French, Roussillon) 1886 (110)
- Trifolium incarnatum L.
- Farratage (French, Languedoc) 1886 (110)
- Trifolium incarnatum L.
- Fascicled agalinis 1913 (5)
- Agalinis fasciculata (Ell.) Raf. [reported as: Agalinis fasciculata (Ell.) Raf.]
- Faselen (German) 1919 (107)
- Phaseolus L.
- Faséole or fazéole (French, until end of 17th century) (110)
- Possibly Phaseolus vulgaris L. [reported as: Phaseolus vulgaris Savi ]
- Fasiolos 100 AD (110) Dioscorides, probably this species
- Possibly Phaseolus vulgaris L. [reported as: Phaseolus vulgaris Savi ]
- Fasiolum ~800 AD (110) Charlemagne
- Possibly Phaseolus vulgaris L. [reported as: Phaseolus vulgaris Savi ]
- Fasoulia (Modern Greek) 1886 (110)
- Possibly Phaseolus vulgaris L. [reported as: Phaseolus vulgaris Savi ]
- Fasulé (Albanian) 1886 (110)
- Possibly Phaseolus vulgaris L. [reported as: Phaseolus vulgaris Savi ]
- Fat-hean saltbush 1923 (156)
- Atriplex subspicata (Nutt.) Rydb. [reported as: Atriplex patula L.]
- Fat-hen [Fat hen]
- 1900-1923 (156, 158)
- Atriplex subspicata (Nutt.) Rydb. [also reported as: Atriplex patula L.]
- 1900 (158) misapplied
- Capsella bursa-pastoris (L.) Medik. [reported as: Bursa bursa-pastoris (L.) Britton]
- 1900-1929 (5, 156, 157, 158)
- Chenopodium album L.
- 1900 (158)
- Chenopodium rubrum L.
- Faulbaum (German) 1900 (158)
- Frangula alnus P. Mill. [reported as: Rhamnus frangula L.]
- Faux acacia (French)
- 1785 (8)
- Robinia L.
- 1785 (8)
- Robinia pseudoacacia L. [reported as: Robinia pseudo-acacia L.]
- Fawn-lily [Fawnlily]
- 1942-Present (50, 109, 155)
- Erythronium L.
- 1923 (156)
- Erythronium albidum Nutt.
- Fayberry [Fay berry, Fay-berry] 1913-1923 (5, 156)
- Ribes uva-crispa L. var. sativum DC. [also reported as: Grossularia reclinata (L.) P. Mill. Ribes grossularia L.]
- Fé (Catalan) 1886 (110)
- Trifolium incarnatum L.
- Feaberry [Fea berry, Fea-berry] (Old English) 1622 (5, 110, 156) Phillips
- Ribes uva-crispa L. var. sativum DC. [also reported as: Grossularia reclinata (L.) P. Mill. Ribes grossularia L.]
- Feas (Old English) 1622 (110) Phillips
- Ribes uva-crispa L. var. sativum DC. [reported as: Ribes grossularia L.]
- Feather bunch grass [Feather bunch-grass] 1901-1936 (5, 56, 93, 94, 111, 129, 157)
- Nassella viridula (Trin.) Barkworth [also reported as: Stipa viridula Trin.]
- Feather dalea 1942 (155)
- Dalea formosa Torr.
- Feather elm 1937 (124) TX
- Ulmus americana L.
- Feather-finger [Featherfinger] or Feather finger grass [Feather fingergrass, Feather finger-grass] 1852-Present (50, 122, 138, 163)
- Chloris virgata Sw.
- Feather grass [Feather-grass, Feathergrass]
- 1884-1942 (1, 45, 66, 87, 93, 138, 155)
- Hesperostipa (Elias) Barkworth [also reported as: Stipa L.]
- 1894-1913 (5, 75) WV
- Holcus lanatus L. [also reported as: Nothoholcus lanatus (L.) Nash]
- 1913-1938 (5, 119) OK
- Leptochloa panicea (Retz.) Ohwi ssp. brachiata (Steudl.) N. Snow [also reported as: Leptochloa filiformis (Lam.) Beauv.]
- 1884-1901 (87, 94)
- Leptochloa panicea (Retz.) Ohwi ssp. mucronata (Michx.) Nowack [also reported as: Leptochloa mucronata (Michx.) Kunth]
- Feather pappus grass [Feather pappusgrass] 1942 (155)
- Enneapogon desvauxii Desv. ex Beauv. [reported as: Pappophorum wrightii S. Wats.]
- Feather Solomon-plume [Feather Solomonplume] 1942 (155)
- Maianthemum racemosum (L.) Link ssp. racemosum [reported as: Smilacina racemosa (L.) Desf.]
- Feathered columbine 1900-1923 (5, 156, 158)
- Thalictrum dioicum L.
- Featherfen 1828 (7)
- Matricaria L.
- Featherfew [Feather few, Feather-few, Fetherfew] 1671-1923 (5, 19, 46, 49, 76, 92, 156, 158)
- Tanacetum parthenium (L.) Schultz-Bip. [also reported as: Chrysanthemum parthenium (L.) Pers., Matricaria parthenium L., Pyrethrum parthenium Smith]
- Feather-geranium [Feather geranium] 1876-1949 (5, 92, 93, 95, 109, 156, 157, 158)
- Chenopodium botrys L.
- Feather-plume [Featherplume, Feather plume] 1986-Present (4, 50)
- Dalea formosa Torr.
- Feather-vein willow [Feathervein willow] 1942 (155)
- Salix planifolia Pursh [reported as: Salix pennata Ball]
- Featherweed [Feather weed, Feather-weed] 1892-1923? (5, 73, 156, 157) Northern NY, seed heads used for bed filling, obsolete by 1923
- Pseudognaphalium obtusifolium (L.) Hilliard & Burtt ssp. obtusifolium [also reported as: Gnaphalium polycephalum Michx., Gnaphalium obtusifolium L.]
- Feathery false lily-of-the-valley [Feathery false lily of the valley]
- Present (50)
- Maianthemum racemosum (L.) Link
- Present (50)
- Maianthemum racemosum (L.) Link ssp. racemosum
- Febrifuge plant 1876-1900 (92, 158)
- Tanacetum parthenium (L.) Schultz-Bip. [also reported as: Chrysanthemum parthenium (L.) Pers., Pyrethrum parthenium]
- Febues du Bresil (Brazilian beans) 1605 (107) Champlain
- Phaseolus vulgaris L.
- Fee's lip fern [Fee lipfern] 1942 (155)
- Cheilanthes feei T. Moore
- Feldgarbe (German) 1900 (158)
- Achillea millefolium L.
- Feldkamille (German) 1900 (158)
- Matricaria recutita L. [reported as: Matricaria chamomila L.]
- Feldminze (German) 1900 (158)
- Mentha arvensis L.
- Feldraute (German) 1900 (158)
- Fumaria officinalis L.
- Feldrose (German) 1900 (158)
- Papaver rhoeas L.
- Felix mas 1905 (54)
- Dryopteris filix-mas (L.) Schott
- Fellen 1923 (156)
- Solanum dulcamara L.
- Fellenwort 1913 (5)
- Solanum dulcamara L.
- Fellwort 1913-1923 (5, 156)
- Gentianella amarella (L.) Boerner ssp. acuta (Michx.) J. Gillett [also reported as: Gentiana acuta Michx., Gentiana amarella L. var. acuta]
- Felonwort
- 1900-1923 (156, 158)
- Chelidonium majus L.
- 1876-1923 (92, 156, 158)
- Solanum dulcamara L.
- Feltwort 1900-1923 (5, 69, 156, 158)
- Verbascum thapsus L.
- Female dogwood
- 1900-1929 (157, 158)
- Cornus amomum P. Mill.
- 1892 (6)
- Cornus sericea L.
- Female fern
- 1876-1929 (5, 92, 157)
- Athyrium filix-femina (L.) Roth [also reported as: Athyrium filix-foemina (L.) Roth]
- 1828-1895 (7, 2, 5, 7, 49, 58, 92)
- Polypodium virginianum L. [also reported as: Polypodium vulgare L.]
- 1900 (158) misapplied
- Thelypteris palustris Schott var. pubescens (Lawson) Fern. [reported as: Dryopteris thelypteris (L.) A. Gray]
- Female fluellin
- 1913 (5)
- Kickxia elatine (L.) Dumort. [reported as: Kickxia spuria (L.) Dumort.]
- 1923 (156)
- Knautia arvensis (L.) Duby [reported as: Linaria elatine (L.) P. Mill.]
- Female knotgrass [Female knot-grass] 1900 (158)
- Hippuris vulgaris L.
- Female nervine 1900-1923 (156, 158)
- Cypripedium reginae Walt. [also reported as: Cypripedium hirsutum Mill]
- Female oak 1900-1929 (157, 158)
- Quercus velutina Lam.
- Fen grass-of-Parnassus [Fen grass of Parnassus] Present (50)
- Parnassia glauca Raf.
- Fen orchis 1913-1936 (5, 93) Neb
- Liparis loeselii (L.) L.C. Rich [also reported as: Liparis liliifolia (L.) L.C. Rich]
- Fench (Catalan) 1886 (110)
- Trifolium incarnatum L.
- Fench pursley 1898 (78) Sulphur Grove OH
- Chamaesyce maculata (L.) Small [reported as: Euphorbia maculata L.]
- Fenchelholz (German) 1900 (158)
- Sassafras albidum (Nutt.) Nees [reported as: Sassafras sassafras (L.) Kaarst.]
- Fendler's aster [Fendler aster] 1913-Present (3, 4, 5, 50, 93, 97, 122)
- Symphyotrichum fendleri (Gray) Nesom [also reported as: Aster fendleri Gray]
- Fendler's bladderpod Present (50)
- Lesquerella fendleri (Gray) Wats.
- Fendler's blue grass [Fendler's blue-grass, Fendler bluegrass] 1901-1942 (94, 155)
- Poa fendleriana (Steud.) Vasey
- Fendler's ceanothus [Fendler ceanothus] 1895-Present (50, 130, 138, 155)
- Ceanothus fendleri Gray
- Fendler's cloak fern [Fendler cloak fern] 1986 (4)
- Argyrochosma fendleri (Kunze) Windham [reported as: Notholaena fendleri Kunze]
- Fendler's cryptanthe 1913 (5)
- Cryptantha fendleri (Gray) Greene
- Fendler's euphorbia [Fendler euphorbia] 1942-1986 (3, 4, 155)
- Chamaesyce fendleri (Torr. & Gray) Small [also reported as: Euphorbia fendleri Torr. & Gray]
- Fendler's false cloak fern Present (50)
- Argyrochosma fendleri (Kunze) Windham
- Fendler's globe-mallow [Fendler's globemallow] Present (50)
- Sphaeralcea fendleri Gray
- Fendler's lip fern [Fendler's lip-fern, Fendler lipfern] 1923-Present (4, 50, 97, 138, 155)
- Cheilanthes fendleri Hook.
- Fendler's oak [Fendler oak] 1942 (155)
- Quercus ×pauciloba Rydb. [gambelii × turbinella] [gambelii × turbinella] [reported as: Quercus fendleri Liebm.]
- Fendler's penstemon [Fendler penstemon] 1942-Present (50, 155)
- Penstemon fendleri Torr. & Gray
- Fendler's redroot 1899 (131) SD
- Ceanothus fendleri Gray
- Fendler's rockcress Present (50)
- Arabis fendleri (S. Wats.) Greene
- Fendler's rose [Fendler rose] 1895-1923 (130, 138) SD
- Rosa woodsii Lindl. var. woodsii [also reported as: Rosa fendleri Crépin, Rosa woodsi fendleri]
- Fendler's sandmat Present (50)
- Chamaesyce fendleri (Torr. & Gray) Small
- Fendler's sandwort [Fendler sandwort] 1913-Present (5, 50, 155)
- Arenaria fendleri Gray
- Fendler's spurge 1913-1937 (5, 93, 97)
- Chamaesyce fendleri (Torr. & Gray) Small
- Fendler's threeawn [Fendler's three awn, Fendler threeawn]
- Present (50)
- Aristida purpurea Nutt. var. longiseta (Steud.) Vasey
- 1913-Present (5, 50, 122, 119, 155)
- Aristida purpurea Nutt. var. fendleriana (Steud.) Vasey [also reported as: Aristida fendleriana Steud.]
- Fendler's triple-awn grass [Fendler's triple-awned grass] Present (50)
- Aristida purpurea Nutt. var. fendleriana (Steud.) Vasey
- Fennel
- 1900-Present (50, 155, 156, 158)
- Foeniculum P. Mill.
- 1671-1937 (1, 5, 7, 19, 46, 49, 53,55, 57, 59, 72, 95, 107, 109, 122, 156, 157, 158, 165)
- Foeniculum vulgare P. Mill. [also reported as: Anethum feniculum L., Foeniculum capillaceum Gilib, Foeniculum foeniculum (L.) Karst., Foeniculum vulgare Gaertn.]
- Fennel gianthyssop 1942 (155)
- Agastache foeniculum (Pursh) Kuntze
- Fennel-leaf pondweed [Fennel-leaved pondweed, Fennel-leaved pond-weed, Fennelleaf pondweed] 1899-1942 (5, 72, 93, 97, 120, 131, 155, 156, 158)
- Stuckenia pectinatus (L.) Boerner [also reported as: Potamogeton pectinatus L.]
- Fenouil (French) 1900 (158)
- Foeniculum vulgare P. Mill. [reported as: Foeniculum foeniculum (L.) Karst.]
- Fenouil puant (French) 1900 (158)
- Anethum graveolens L.
- Fern 1828 (7)
- Cystopteris Bernh. [reported as: Filix Adans.]
- Fern brake 1876 (92)
- Osmunda regalis L.
- Fern flatsedge 1977 (3)
- Cyperus lupulinus (Spreng.) Marcks ssp. lupulinus [reported as: Cyperus filiculmis Vahl]
- Fern root [Fernroot] 1828-1898 (7, 49, 92)
- Polypodium virginianum L. [also reported as: Polypodium vulgare L.]
- Fernald's bulrush 1913 (5)
- Schoenoplectus maritimus (L.) Lye [reported as: Scirpus fernaldi Bickwell]
- Fernald's hay sedge Present (50)
- Carex siccata Dewey [reported as: Carex aenea Fernald, Carex foenea Willd. var. foenea]
- Fernald's yellow-cress [Fernald's yellowcress] Present (50)
- Rorippa palustris (L.) Bess. ssp. fernaldiana (Butters & Abbe) Jonsell
- Fern-leaf fleabane [Fernleaf fleabane] 1942 (155)
- Erigeron compositus Pursh
- Feroutgé (French, Gascony) 1886 (110)
- Trifolium incarnatum L.
- Fescue or Fescue grass [Fescue-grass]
- 1818-Present (1, 10, 50, 66, 93, 109, 138, 155, 152, 163)
- Festuca L.
- 1840-1876 (19, 92)
- Lolium pratense (Huds.) S.J. Darbyshire [also reported as: Festuca elatior L., Festuca pratensis Huds.]
- 1932 (85) SD
- Vulpia octoflora (Walt.) Rydb. var. octoflora [reported as: Festuca octoflora Walt.]
- Fescue scolochloa 1901-1907 (56, 72) IA
- Scolochloa festucacea (Willd.) Link
- Fescue sedge
- 1977 (3)
- Carex brevior (Dewey) Mackenzie
- 1893-Present (5, 50, 72)
- Carex festucacea Schkuhr
- Festid-shrub 1929 (157)
- Asimina triloba (L.) Dunal [reported as: Asimina triloba Dunal.]
- Festoon-pine [Festoon pine]
- 1913 (5)
- Lycopodium complanatum L.
- 1840-1913 (5, 19, 92, 158)
- Selaginella rupestris (L.) Spring [also reported as: Lycopodium rupestre]
- Festuca avenacea sterilis humilior 1622 (46) Bauhin
- Bromus tectorum L.
- Fetid buckeye 1849-1936 (5, 2, 13, 15, 49, 53, 93, 156, 157, 158)
- Aesculus glabra Willd.
- Fetid chamomile [Fetid camomile] 1900 (5, 93, 95, 97, 157, 158)
- Anthemis cotula L.
- Fetid gourd 1918?-1970? (121)
- Cucurbita foetidissima Kunth
- Fetid horehound [Fetid hoarhound]
- 1923 (156)
- Ballota L.
- 1900-1923 (5, 156, 158)
- Ballota nigra L.
- Fetid marigold [Foetid marigold]
- 1895-1932 (1, 2, 158)
- Dyssodia Cav. [also reported as: Boebera Willd.]
- 1899-Present (3, 4, 5, 37, 50, 63, 62, 72, 80, 85, 93, 95, 121, 131, 148, 156, 158)
- Dyssodia papposa (Vent.) A.S. Hitchc. [also reported as: Boebera papposa (Vent.) Rydb., Dyssodia chrysanthemoides Lag.]
- Fetid mayweed [Fetid may-weed] 1900-1929 (157, 158)
- Anthemis cotula L.
- Fetid nightshade 1900-1923 (5, 156, 158)
- Hyoscyamus niger L.
- Fetid rayless goldenrod [Fetid rayless golden-rod] 1913-1937 (5, 93, 112, 158)
- Ericameria nauseosa (Pallas ex Pursh) Nesom & Baird ssp. nauseosa var. glabrata (Gray) Nesom & Baird [reported as: Chrysothamnus nauseosus (Pallas ex Pursh) Britton]
- Fetid sumac 1936 (93) Neb
- Rhus trilobata Nutt. var. trilobata [reported as: Schmaltzia tribolata (Nutt.) Small.]
- Fetid wild pumpkin 1923 (156)
- Cucurbita foetidissima Kunth
- Fetidshrub [Fetid shrub, Fetid-shrub] 1900-1923 (5, 156, 158)
- Asimina triloba (L.) Dunal [also reported as: Asimina triloba Dunal.]
- Fetter-foe 1900 (158)
- Tanacetum parthenium (L.) Schultz-Bip. [reported as: Chrysanthemum parthenium (L.) Pers.]
- Feuerkraut (German) 1892 (6)
- Erechtites hieraciifolia (L.) Raf. ex DC.
- Fever plant [Fever-plant] 1893-1923? (5, 74, 156, 157, 158) Eastern states, used as diaphoretic, obsolete by 1923
- Oenothera biennis L. [also reported as: Onagra biennis (L.) Scop.]
- Feverbush [Fever bush, Fever-bush]
- 1895 (2)
- Lindera Thunb.
- 1828-1923 (5, 6, 7, 19, 46, 49, 58, 92, 156)
- Lindera benzoin Blume. [also reported as: Benzoin aestivale (L.) Nees, Laurus benzoin L., Benzoin odoriferum]
- Feverfew [Fever few]
- 1913 (5)
- Agrimonia gryposepala Wallr.
- 1932-Present (1, 50)
- Parthenium L.
- 1937 (124) TX
- Parthenium hysterophorus L.
- 1869-Present (4, 49, 50, 57, 58, 61, 76, 92, 109, 138, 158)
- Tanacetum parthenium (L.) Schultz-Bip. [also reported as: Chrysanthemum parthenium (L.) Pers., Matricaria parthenium L., Pyrethrum parthenium Smith]
- Feverfew chrysanthemum 1942 (155)
- Tanacetum parthenium (L.) Schultz-Bip. [reported as: Chrysanthemum parthenium (L.) Pers.]
- Feverfew-chamomile 1923 (138)
- Tanacetum parthenium (L.) Schultz-Bip. [reported as: Matricaria parthenoides]
- Fever-root [Fever root, Feverroot]
- 1876-1908 (64, 92, 158)
- Corallorrhiza odontorhiza (Willd.) Poir. [also reported as: Corallorrhiza odontorhiza (Willd.) Nutt.]
- 1929 (157)
- Corallorrhiza trifida Chat. [reported as: Corallorrhiza corallorrhiza (L.) Karst., Coralorhiza corallorrhiza ]
- 1828-1869 (7, 58)
- Pterospora andromedea Nutt.
- 1900 (158)
- Triosteum L.
- 1828-1923 (5, 6, 7, 19, 57, 58, 92, 107, 156, 158)
- Triosteum perfoliatum L.
- Fever-twig [Fever-twig]
- 1828-1929 (5, 7, 49, 92, 156, 157, 158)
- Celastrus scandens L.
- 1923 (156)
- Lycium barbarum L. [reported as: Lycium halimifolium P. Mill.]
- 1898-1900 (71, 158)
- Solanum dulcamara L.
- Fever-twitch [Fever twitch] 1876 (92)
- Celastrus scandens L.
- Feverweed [Fever weed, Fever-weed]
- 1882 (48) Kansas
- Agalinis Raf. [reported as: Gerardia]
- 1892 (73, 156, 158) Peoria IL, thought to be specific for fever and ague
- Verbena stricta Vent.
- Feverwood [Fever wood] 1876-1898 (49, 92)
- Lindera benzoin Blume. [also reported as: Laurus benzoin L.]
- Feverwort [Fever wort, Fever-wort]
- 1828-1929 (6, 7, 69, 92, 156, 157, 158)
- Eupatorium perfoliatum L.
- 1818-1986 (2, 4, 10, 156)
- Triosteum L.
- 1882-Present (5, 6, 48, 49, 50, 63, 92, 97, 155, 156, 158)
- Triosteum perfoliatum L.
- Fevier (French) 1796 (17)
- Robinia pseudoacacia L. [reported as: Robinia pseudo-acacia L.]
- Févier (French) 1785 (8)
- Gleditsia L. [reported as: Gleditschia L.]
- Févier à épines à trois pointes (French) 1785 (8)
- Gleditsia triacanthos L.
- Févier aquatique (French) 1785 (8)
- Gleditsia aquatica Marsh.
- Fevier épineux (French) 1796 (17)
- Gleditsia triacanthos L.
- Few flower aristida [Few flowered aristida, Few-flowered aristida] 1852-1938 (99, 119, 163)
- Aristida oligantha Michx.
- Few-flower buckwheat [Fewflower buckwheat]
- Present (50)
- Eriogonum pauciflorum Pursh
- Present (50)
- Eriogonum pauciflorum Pursh var. gnaphalodes (Benth.) Reveal
- Present (50)
- Eriogonum pauciflorum Pursh var. pauciflorum
- Few-flower club-rush [Few-flowered club rush] 1913 (5)
- Eleocharis quinqueflora (F.X. Hartmann) Schwarz [reported as: Scirpus pauciflorus Lightf.]
- Few-flower cranberry tree [Few-flowered cranberry tree, Few-flowered cranberry-tree] 1900-1913 (5, 158)
- Viburnum edule (Michx.) Raf. [also reported as: Viburnum pauciflorum Pylaie]
- Few-flower eriogonum [Few-flowered eriogonum] 1899-1913 (5, 131) SD
- Eriogonum pauciflorum Pursh
- Few-flower nutsedge [Fewflower nutsedge]
- Present (50)
- Scleria pauciflora Muhl. ex Willd.
- Present (50)
- Scleria pauciflora Muhl. ex Willd. var. pauciflora
- Few-flower panic grass [Few-flowered panic grass, Few-flowered panic-grass]
- 1885 (90) ME
- Dichanthelium depauperatum (Muhl.) Gould [reported as: Panicum depauperatum Muhl.]
- 1938 (119) OK
- Dichanthelium oligosanthes (J.A. Schultes) Gould var. oligosanthes [reported as: Panicum oligosanthes Schult.]
- Few-flower panicum [Few-flowered panicum] 1913 (5)
- Dichanthelium oligosanthes (J.A. Schultes) Gould var. oligosanthes [reported as: Panicum oligosanthes Schult.]
- Few-flower psoralea [Few-flowered psoralea] 1899-1937 (5, 72, 93, 97, 121, 131)
- Psoralidium tenuiflorum (Pursh) Rydb. [also reported as: Psoralea tenuiflora Pursh]
- Few-flower razor-sedge [Fewflower razor-sedge, Fewflower razorsedge] 1942-1977 (3, 155)
- Scleria pauciflora Muhl. ex Willd.
- Few-flower spike-rush [Fewflower spikerush] Present (50)
- Eleocharis quinqueflora (F.X. Hartmann) Schwarz
- Few-flower threeawn [Few-flowered threeawn] 1913-1977 (5, 3)
- Aristida oligantha Michx.
- Few-flower tickclover [Few-flowered tickclover] 1986 (4)
- Desmodium pauciflorum (Nutt.) DC.
- Few-flower ticktrefoil [Fewflower ticktrefoil, Few-flowered tick trefoil, Few-flowered tick-trefoil] 1907-Present (50, 5, 72, 97)
- Desmodium pauciflorum (Nutt.) DC. [also reported as: Meibomia pauciflora (Nutt.) Kuntze]
- Few-flowered aster 1977-1986 (3, 4)
- Almutaster pauciflorus (Nutt.) A.& D. Löve [also reported as: Aster pauciflorus Nutt.]
- Few-flowered lion's heart 1913 (5)
- Physostegia virginiana (L.) Benth. ssp. virginiana [reported as: Dracocephalum denticulatum Aiton]
- Few-fruit sedge [Few-fruited sedge] 1907-1913 (5, 72) IA
- Carex oligocarpa Schkuhr ex Willd.
- Few-hair beard grass [Few-haired beard-grass] 1913 (5)
- Andropogon hallii Hack. [reported as: Andropogon paucipilus Nash.]
- Few-seed mentzelia [Fewseed mentzelia, Few-seeded mentzelia] 1899-1937 (5, 97, 131)
- Mentzelia oligosperma Nutt. ex Sims
- Few-seed sedge [Fewseed sedge] 1942 (155)
- Carex oligocarpa Schkuhr ex Willd.
- Fiall-kampe 1879 (46)
- Phleum alpinum L.
- Fibrous bladderwort 1913-1937 (5, 122) TX
- Utricularia gibba L. [also reported as: Utricularia fibrosa Walt.]
- Fibrous-root wheat grass [Fibrous-rooted wheat grass] 1913 (5)
- Elymus trachycaulus (Link) Gould ex Shinners ssp. trachycaulus
- Fiddle 1900-1929 (157, 158)
- Daucus carota L.
- Fiddle dock 1929 (157)
- Rumex obtusifolius L.
- Fiddleheads [Fiddle heads] 1892 (73) Petit Codiac NB
- Osmunda L.
- Fiddleleaf Present (50)
- Nama L.
- Fiddle-leaf hawk's-beard [Fiddleleaf hawksbeard]
- Present (50)
- Crepis runcinata (James) Torr. & Gray
- Present (50)
- Crepis runcinata (James) Torr. & Gray ssp. runcinata
- Fiddleneck [Fiddle neck]
- 1932-Present (1, 4, 50, 155)
- Amsinckia Lehm.
- 1977 (3)
- Amsinckia menziesii (Lehm.) A. Nels. & J.F. Macbr. [reported as: Amsinckia intermedia Fisch. & Mey.]
- Fiddle-shaped greenbrier 1913 (5)
- Smilax bona-nox L.
- Fieberklee (German) 1892-1900 (6, 158)
- Menyanthes trifoliata L.
- Field ash 1911 (95) Neb
- Fraxinus pennsylvanica Marsh. [reported as: Fraxinus campestris Britton]
- Field avens 1895 (2)
- Geum aleppicum Jacq. [reported as: Geum strictum Aiton]
- Field balsam 1929 (157)
- Pseudognaphalium obtusifolium (L.) Hilliard & Burtt ssp. obtusifolium [reported as: Gnaphalium obtusifolium L.]
- Field bindweed
- 1840 (19)
- Calystegia sepium (L.) R. Br. ssp. angulata Brummitt [reported as: Convolvulus sepium L.]
- 1986 (4)
- Convolvulus L.
- 1912-Present (3, 4, 50, 62, 82, 107)
- Convolvulus arvensis L.
- Field brome or Field brome grass 1901-Present (3, 5, 50, 56, 68, 155) IA
- Bromus arvensis L.
- Field buttercup 1900-1929 (157, 158)
- Ranunculus acris L.
- Field camomile [Field camomile] 1900-1942 (5, 72, 155, 156, 158) IA
- Anthemis arvensis L.
- Field chess 1907-1913 (5, 72) IA
- Bromus arvensis L.
- Field chickweed
- 1899-Present (5, 50, 72, 131, 156)
- Cerastium arvense L.
- Present (50)
- Cerastium arvense L. ssp. strictum (L.) Ugborogho
- Field clover
- 1840-1900 (19, 158)
- Trifolium arvense L.
- Present (50)
- Trifolium campestre Schreber.
- Field corn 1938 (119) OK
- Zea mays L.
- Field cotton-rose [Field cottonrose] Present (50)
- Logfia arvensis (L.) Holub
- Field cress
- 1900-1923 (5, 156, 158)
- Lepidium campestre (L.) Aiton f. [also reported as: Lepidium campestre (L.) R. Br.]
- 1929 (157)
- Lepidium virginicum L.
- 1932 (85) SD
- Thlaspi arvense L.
- Field daisy [Field-daisy] 1898-1936 (5, 49, 53, 82, 93, 106, 156)
- Leucanthemum vulgare Lam. [also reported as: Chrysanthemum leucanthemum L., Chrysanthemum leucanthemum L. var. pinnatifidum Lecoq & Lamotte]
- Field dodder
- 1977-1986 (3, 4)
- Cuscuta pentagona Engelm.
- 1899-1937 (5, 62, 72, 80, 82, 93, 95, 97, 131, 156)
- Cuscuta pentagona Engelm. var. pentagona [also reported as: Cuscuta arvensis Beyrich.]
- Field evening-primrose [Field evening primrose] 1900-1929 (157, 158)
- Oenothera biennis L. [also reported as: Onagra biennis (L.) Scop.]
- Field foxtail grass [Field fox-tail grass] 1768 (165)
- Alopecurus myosuroides Huds. [reported as: Alopecurus agrestis L.]
- Field garlic 1840-1942 (5, 19, 62, 85, 155, 156, 158)
- Allium vineale L.
- Field goldenrod [Field golden-rod] 1899-1936 (5, 62, 72, 93, 131, 156, 158)
- Solidago nemoralis Aiton
- Field ground-cherry [Field groundcherry] Present (50)
- Physalis mollis Nutt.
- Field horsetail 1899-Present (3, 4, 5, 50, 72, 131, 155, 157, 158)
- Equisetum arvense L.
- Field kale 1900-1929 (5, 157)
- Sinapis arvensis L.
- Field lily 1900-1929 (156, 157, 158)
- Lilium canadense L.
- Field locoweed Present (50)
- Oxytropis campestris (L.) DC.
- Field madder 1923 (156)
- Sherardia L.
- Field milkvetch [Field milk vetch] 1986 (4)
- Astragalus agrestis Dougl. ex G. Don
- Field milkwort 1900-1936 (5, 72, 93, 156, 157)
- Polygala sanguinea L.[also reported as: Polygala viridescens L.]
- Field mint
- 1840-1986 (3, 4, 5, 19, 93, 98, 138, 155, 156, 158)
- Mentha arvensis L.
- 1900-1929 (69, 157, 158)
- Nepeta cataria L.
- Field mouse-ear 1923 (156)
- Cerastium arvense L.
- Field mouse-ear chickweed 1878 (86)
- Cerastium arvense L.
- Field mustard
- Present (50)
- Brassica rapa L.
- 1949-Present (50, 109)
- Brassica rapa L. var. rapa [also reported as: Brassica campestris L.]
- 1919 (107)
- Sinapis arvensis L. [reported as: Brassica sinapistrum Boiss.]
- Field oxeye daisy [Field oxeyedaisy] 1942 (155)
- Leucanthemum vulgare Lam. [reported as: Chrysanthemum leucanthemum L. var. pinnatifidum Lecoq & Lamotte]
- Field oxytropis 1913 (5)
- Oxytropis campestris (L.) DC.
- Field pansy
- 1913-Present (5, 50, 93, 97)
- Viola bicolor Pursh [also reported as: Viola rafinesquei Greene]
- 1892 (6)
- Viola tricolor L.
- Field paspalum 1913-Present (3, 5, 50, 99, 155)
- Paspalum laeve Michx. [also reported as: Paspalum laeve Michx. var. circulare (Nash) Fern., Paspalum laeve Michx. var. pilosum Scribn.]
- Field pea [Field-pea] 1886-1949 (107, 109, 110)
- Pisum sativum L. [also reported as: Pisum arvense L., Pisum sativum L. var. arvense (L.) Poir.]
- Field pennycress [Field penny cress, Field penny-cress] 1899-Present (4, 5, 50, 63, 72, 80, 97, 155, 156, 158)
- Thlaspi arvense L.
- Field peppergrass [Field pepper grass, Field pepper-grass]
- 1912-1986 (3, 4, 62) IN
- Lepidium campestre (L.) Aiton f. [also reported as: Lepidium campestre (L.) R. Br.]
- 1899 (131) SD
- Thlaspi arvense L.
- Field pepperweed 1942-Present (50, 155)
- Lepidium campestre (L.) Aiton f. [also reported as: Lepidium campestre (L.) R. Br.]
- Field poppy 1900-1986 (4, 5, 107, 156, 158)
- Papaver rhoeas L.
- Field pumpkin
- 1930-Present (50, 82, 109)
- Cucurbita pepo L.
- Present (50)
- Cucurbita pepo L. var. pepo
- Field pussy-toes [Field pussytoes] 1942-Present (3, 4, 50, 155)
- Antennaria neglecta Greene
- Field sagewort Present (50)
- Artemisia campestris L.
- Field sandbur
- 1944-1977 (3, 140)
- Cenchrus longispinus (Hack.) Fern.
- 1937 (122) TX
- Cenchrus spinifex Cav. [reported as: Cenchrus pauciflorus Benth.]
- Field scabiosa Present (50)
- Knautia arvensis (L.) Duby
- Field scabious 1876-1986 (4, 5, 92, 155, 156, 158)
- Knautia arvensis (L.) Duby [also reported as: Scabiosa arvense L.]
- Field snake-cotton [Field snake cotton, Field snakecotton] 1986 (4)
- Froelichia floridana (Nutt.) Moq.
- Field soapwort 1840-1929 (19, 156, 157, 158)
- Vaccaria hispanica (P. Mill.) Rauschert [also reported as: Saponaria vaccaria L., Vaccaria vaccaria (L.) Britton]
- Field sorrel
- 1913 (80) IA
- Oxalis corniculata L.
- 1913 (80) IA
- Oxalis stricta L.
- 1840-1929 (5, 19, 62,, 156, 157, 158) IN
- Rumex acetosella L.
- Field sow-thistle [Field sow thistle, Field sowthistle] 1900-Present (3, 4, 50, 82, 155, 157)
- Sonchus arvensis L.
- Field speedwell 1840-1986 (3, 4, 5, 19, 155, 158)
- Veronica agrestis L.
- Field spurry 1942 (155)
- Spergula arvensis L. [reported as: Spergula sativa Boenn.]
- Field thistle
- 1986 (4)
- Cirsium arvense (L.) Scop. [reported as: Carduus arvensis (L.) Robson]
- 1899-Present (3, 5, 50, 62, 72, 93, 95, 97, 122, 131, 156)
- Cirsium discolor (Muhl. ex Willd.) Spreng.
- Field violet
- 1942 (155)
- Viola arvensis Murray
- 1913-1923 (5, 156)
- Viola bicolor Pursh [also reported as: Viola rafinesquei Greene]
- Field wormwood 1840 (19)
- Artemisia campestris L.
- Field yam-root 1923 (156)
- Smilax herbacea L.
- Field-balm [Field balm] 1900-1913 (5, 109, 157, 158)
- Glechoma hederacea L. [also reported as: Nepeta hederacea Trevisan]
- Field's cat's-foot [Field's cat's foot] 1913 (5)
- Antennaria neglecta Greene
- Fieldweed [Field weed]
- 1828-1876 (7, 92)
- Anthemis cotula L.
- 1828 (7)
- Erigeron philadelphicus L.
- Fieldwort [Field wort] 1876-1929 (92, 157, 158)
- Anthemis cotula L.
- Fighting-cocks [Fighting cocks, Fightingcocks] 1913 (5)
- Viola nephrophylla Greene [reported as: Viola papilionacea Pursh]
- Fig-leaf grape [Figleaf grape] 1942 (155)
- Vitis aestivalis Michx.var. aestivalis [reported as: Vitis smalliana Bailey]
- Figwort
- 1818-Present (1, 2, 4, 7, 10, 50, 82, 93, 155, 156, 158)
- Scrophularia L. [also reported as: Scrophularia (Tourn.) L.]
- 1930-1977 (3, 82)
- Scrophularia lanceolata Pursh [also reported as: Scrophularia leporella Bicknell]
- 1840-1936 (19, 48, 61, 62, 63, 85, 92, 93, 106, 156)
- Scrophularia marilandica L.
- Figwort giant-hyssop 1913 (5)
- Agastache scrophulariifolia (Willd.) Kuntze
- Figwort herb 1876 (92)
- Scrophularia marilandica L.
- Filago 1899-1937 (5, 97, 131)
- Evax prolifera Nutt. ex DC. [also reported as: Filago prolifera (Nutt.) Britton]
- Filagro palustris capitulis nigricantibus supina 1879 (46) Ruppius
- Gnaphalium uliginosum L.
- Filaree [Filerie, Fileree]
- 1930-1932 (1, 106)
- Erodium L'Her. ex Aiton
- 1896-1977 (3, 5, 76, 156, 158) CA, among Spanish
- Erodium cicutarium (L.) L'Hér. ex Aiton
- Filaria 1986 (4)
- Erodium cicutarium (L.) L'Hér. ex Aiton
- Filberds
- 1879 (46)
- Corylus americana Walt.
- 1617 (46)
- Corylus cornuta Marsh. var. cornuta [reported as: Corylus rostrata Aiton]
- Filbert [Philburt, filberds, or philberds]
- 1828-1942 (2, 7, 14, 92, 109, 138, 155) from French for St. Philibert, nuts ripe about time of feast day
- Corylus L.
- 1879-1937 (5, 46, 97, 156)
- Corylus americana Walt.
- 1617-1806 (35, 46) William Clark, Meriwether Lewis
- Corylus cornuta Marsh. [reported as: Corylus cornuta H.R.P.]
- File lily 1913 (5)
- Lilium canadense L.
- Filiform dropseed 1913 (5)
- Muhlenbergia torreyi (Kunth) A.S. Hitchc. ex Bush [reported as: Muhlenbergia gracillima Torr.]
- Filiform pondweed 1913 (5)
- Stuckenia filiformis (Pers) Boerner ssp. filiformis [reported as: Potamogeton filiformis Pers.]
- Filix mas 1911 (55)
- Dryopteris filix-mas (L.) Schott
- Filix minor palustris repens 1673 (46) Ray
- Thelypteris palustris Schott [reported as: Aspidium thelypteris Swartz.]
- Filix mollis s. glabra vulgari mari non ramosae accedens 1622 (46) Bauhin
- Thelypteris palustris Schott Aspidium thelypteris Swartz.]
- Filix non ramosa petiolis tenuissime dentatis 1694 (46) Tournefort
- Athyrium filix-femina (L.) Roth [reported as: Athyrium filix-foemina (L.) Roth]
- Filix palustris altera fusco pulvere hirsuta 1622 (46) C. Bauhin
- Matteuccia struthiopteris (L.) Todaro [reported as: Struthiopteris germanica]
- Filix petraea faemina prima 1588 (46) Tabernaemontaus
- Athyrium filix-femina (L.) Roth [reported as: Athyrium filix-foemina (L.) Roth]
- Filix pumila sacatillis secunda 1879 (46)
- Cystopteris fragilis (L.) Bernh.
- Filix pumilia saxatilis 1583 (46) Clusius
- Gymnocarpium dryopteris (L.) Newman [reported as: Polypodium dryopteris ]
- Filix ramosa minor pinnulis dentatis 1622 (46) Bauhin
- Gymnocarpium dryopteris (L.) Newman [reported as: Polypodium dryopteris [L.]]
- Filix Veneris 1828 (7)
- Adiantum pedatum L.
- Fimble 1919-1923 (107, 156)
- Cannabis sativa L.
- Fimbry Present (50)
- Fimbristylis Vahl.
- Finckle 1686-1807 (107, 165) Ray
- Foeniculum vulgare P. Mill. [also reported as: Anethum foeniculum L.]
- Fine John 1913 (5)
- Agrostis gigantea Roth [reported as: Agrostis alba L.]
- Fine prairie grass 1896 (45)
- Muhlenbergia glomerata (Willd.) Trin.
- Fine slough grass 1896 (45)
- Muhlenbergia glomerata (Willd.) Trin.
- Fine-leaf actinea [Fineleaf actinea] 1942 (155)
- Tetraneuris linearifolia (Hook.) Greene var. linearifolia [reported as: Actinea linearifolia (Hook.) Kuntze (Hymenoxys linearifolia Hook.)]
- Fine-leaf bitterweed [Fineleaf bitterweed] 1937 (122) TX
- Tetraneuris linearifolia (Hook.) Greene var. linearifolia [reported as: Actinea linearifolia (Hook.) Kuntze , Hymenoxys linearifolia Hook.]
- Fine-leaf blue grass [Fine-leafed blue-grass] 1901 (94)
- Poa secunda J. Presl. [reported as: Poa nudata Scribn.]
- Fine-leaf four-nerve daisy [Fineleaf fournerved daisy]
- Present (50)
- Tetraneuris linearifolia (Hook.) Greene
- Present (50)
- Tetraneuris linearifolia (Hook.) Greene var. linearifolia
- Fineleaf gerardia 1977-1986 (3, 4)
- Agalinis densiflora (Benth.) Blake [also reported as: Tomanthera densiflora Benth.]
- Fine-leaf hedge-mustard [Fine-leaved hedge mustard, Fine-leaved hedge-mustard] 1900-1929 (5, 157, 158)
- Descurainia sophia (L.) Webb ex Prantl [also reported as: Sophia sophia (L.) Britton]
- Fine-leaf hymenopappus [Fineleaf hymenopappus]
- 1942-Present (50, 155)
- Hymenopappus filifolius Hook.
- Present (50)
- Hymenopappus filifolius Hook. var. cinereus (Rydb.) I.M. Johnst.
- Fine-leaf pondweed [Fineleaf pondweed]
- Present (50)
- Stuckenia filiformis (Pers) Boerner
- Present (50)
- Stuckenia filiformis (Pers) Boerner ssp. alpinus (Blytt) Haynes, D.H. Les, & M. Kral
- Present (50)
- Stuckenia filiformis (Pers) Boerner ssp. filiformis
- Fine-leaf sneezeweed [Fineleaf sneezeweed, Fine-leaved sneezeweed] 1900-1937 (5, 72, 97, 158)
- Helenium amarum (Raf.) H. Rock var. amarum [also reported as: Helenium tenuifolium Nutt.]
- Fine-leaf tetraneuris [Fine-leaved tetraneuris] 1913-1937 (5, 97)
- Tetraneuris linearifolia (Hook.) Greene
- Fine-leaf thelesperma [Fine-leaved thelesperma] 1913-1937 (5, 97)
- Thelesperma filifolium (Hook.) Gray var. filifolium [also reported as: Thelesperma trifidum (Poir.) Britton]
- Fines bent 1901 (56) IA
- Agrostis gigantea Roth [reported as: Agrostis alba L.]
- Fine-top 1899 (144) KS
- Sporobolus airoides (Torr.) Torr.
- Fine-top grass [Fine top grass] 1896 (151) NM
- Sporobolus airoides (Torr.) Torr.
- Fine-top salt grass [Fine-top salt-grass] 1901-1913 (5, 94)
- Sporobolus airoides (Torr.) Torr.
- Fingel 1900 (158)
- Foeniculum vulgare P. Mill. [reported as: Foeniculum foeniculum (L.) Karst.]
- Finger-berry [Finger berry, Fingerberry]
- 1923 (156)
- Rubus allegheniensis Porter
- 1893 (74) Ann Arbor Mich
- Rubus flagellaris Willd. [reported as: Rubus villosus Aiton]
- Finger coreopsis 1923-1986 (3, 4, 138, 155)
- Coreopsis palmata Nutt.
- Finger flower 1876-1904 (69, 92)
- Digitalis pupurea L.
- Finger grass [Finger-grass, Fingergrass]
- 1896 (45)
- Andropogon gerardii Vitman [reported as: Andropogon provincialis Lam.]
- 1923 (138)
- Chloris Sw.
- 1942 (155)
- Digitaria Haller
- 1938 (119) OK
- Digitaria ischaemum (Schreb.) Schreb. ex Muhl.
- 1840-1938 (5, 19, 45, 56, 62, 66, 80, 92, 107, 119, 143, 155)
- Digitaria sanguinalis (L.) Scop.. [also reported as: Panicum sanguinale L., Syntherisma sanguinalis (L.) Dulac]
- Finger poppy-mallow [Finger poppy mallow, Finger poppymallow] 1942-1986 (3, 4, 155)
- Callirhoe digitata Nutt.
- Finger speedwell Present (50)
- Veronica triphyllos L.
- Fingerleaf 1828 (7)
- Lupinus L. [reported as: Lupinus (Tourn.) L.]
- Finger-shaped paspalum 1903 (66)
- Paspalum distichum L. [reported as: Paspalum digitaria [Poir]]
- Finger-spike broom grass [Finger-spiked broom grass] 1884-1885 (87, 88)
- Andropogon gerardii Vitman [also reported as: Andropogon furcatus Muhl., Andropogon provincialis Lam.]
- Finger-spike Indian grass [Finger-spiked Indian grass] 1899 (144) KS
- Andropogon gerardii Vitman [reported as: Andropogon furcatus Muhl.]
- Finger-spike wood grass [Finger-spiked wood grass] 1885-1903 (66, 90) ME
- Andropogon gerardii Vitman [also reported as: Andropogon furcatus Muhl.]
- Finkel 1900-1923 (5, 156, 158)
- Foeniculum vulgare P. Mill. [also reported as: Foeniculum foeniculum (L.) Karst.]
- Finochio 1919 (107)
- Foeniculum vulgare P. Mill.
- Fin's grass 1896-1904 (45, 64, 69)
- Elymus repens (L.) Gould [also reported as: Agropyron repens (L.) Beauv.]
- Finzach 1900 (158)
- Polygonum aviculare L.
- Fiorin or Fiorin grass
- 1876-1949 (5, 45, 56, 67, 88, 92, 109, 119) Irish name
- Agrostis gigantea Roth [also reported as: Agrostis alba L.]
- 1876-1903 (66, 68, 92)
- Agrostis stolonifera L.
- Fir rape [Fir-rape]
- 1923 (156)
- Monotropa hypopithys L. [reported as: Hypopitys hypopitys (L.) Small.]
- 1876 (92)
- Monotropa uniflora L.
- Fir rope 1913-1923? (5, 156) obsolete by 1923
- Monotropa hypopithys L. [also reported as: Hypopitys americana (DC.) Small]
- Fire bush 1893 (21)
- Kochia scoparia (L.) Schrad. [reported as: Kochia scoparia (L.) Roth]
- Fire cherry 1896 (5, 76, 156, 158) Franklin Co. ME, appears on newly burned land
- Prunus pensylvanica L. f.
- Fire lily 1923 (156)
- Lilium philadelphicum L.
- Fire-balls [Fire-balls] 1892-1923? (5, 73, 156, 158) Mansfield OH obsolete by 1923
- Lychnis chalcedonica L.
- Fireberry hawthorn 1942-Present (50, 155)
- Crataegus chrysocarpa Ashe
- Fire-lily 1923 (156)
- Hemerocallis fulva (L.) L.
- Fire-on-the-mountain [Fire on the mountain] 1923-Present (3, 4, 50, 156)
- Euphorbia cyathophora Murray
- Firetop [Fire top, Fire-top]
- 1900-1929 (5, 157, 158)
- Chamerion angustifolium (L.) Holub
- 1893-1923 (74, 156) Penobscot River ME, lumberman
- Chamerion angustifolium (L.) Holub ssp. angustifolium [also reported as: Epilobium angustifolium L.]
- Fireweed [Fire weed, Fire-weed]
- 1930 (106) CA, a skin irritant
- Amsinckia lycopsoides Lehm.
- Present (50)
- Chamerion Raf. ex Holub
- 1899-Present (50, 85, 92, 137, 131, 157, 158)
- Chamerion angustifolium (L.) Holub [also reported as: Chamaenerion spicatum (Lam.) S.F. Gray.]
- Present (50)
- Chamerion angustifolium (L.) Holub ssp. circumvagum (Mosquin) Kartesz
- 1899-Present (3, 40, 50, 63, 82, 106, 107, 109, 156)
- Chamerion angustifolium (L.) Holub ssp. angustifolium [also reported as: Epilobium angustifolium L.]
- 1898-1929 (5, 69, 92, 156, 157, 158)
- Conyza canadensis (L.) Cronq. var. canadensis [also reported as: Erigeron canadensis L., Leptilon canadense (L.) Britton]
- 1900-1923 (5, 69, 156, 158) misapplied
- Datura stramonium L.
- 1932-1986 (1, 4, 93)
- Epilobium L. [also reported as: Chamaenerion (Gesn.) Ludw., Chamaenerion (Tourn.) Adans]
- 1900-1986 (1, 3, 4, 158)
- Erechtites Raf.
- 1840-1936 (5, 6, 19,48, 49, 53, 57, 58, 61, 62, 63, 72, 80, 92, 93, 122, 156, 157, 158)
- Erechtites hieraciifolia (L.) Raf. ex DC. [also reported as: Erechtites hieracifolius, Senecio hieraciifolius L.]
- 1892-1923 (5, 6, 156, 158) misapplied
- Lactuca canadensis L.
- 1828 (7)
- Senecio L.
- Fireweed fiddleneck 1942 (155)
- Amsinckia menziesii (Lehm.) A. Nels. & J.F. Macbr. [reported as: Amsinckia intermedia Fisch. & Mey.]
- Firewheel
- Present (50)
- Gaillardia pulchella Foug.
- Present (50)
- Gaillardia pulchella Foug. var. pulchella
- First-flower-of-the-spring [First flower of the spring] 1818 (10)
- Primula L.
- Fisfisat (Arabic) 1886 (110)
- Medicago sativa L.
- Fish mint [Fish-mint]
- 1900-1923 (5, 156, 158)
- Mentha aquatica L. [also reported as: Mentha citrata Ehrh.]
- 1900-1923 (5, 156, 158)
- Mentha spicata L. [also reported as: Mentha longifolia (L.) Huds.]
- Fish-blankets 1923 (156)
- Ceratophyllum demersum L.
- Fish-grass 1949 (109)
- Cabomba caroliniana Gray
- Fish-leaves 1900 (158)
- Potamogeton natans L.
- Fishweed [Fish-weed]
- 1932 (1)
- Potamogeton L. [reported as: Potamogeton (Tourn.) L.]
- 1923 (156)
- Chenopodium ambrosioides L. var. ambrosioides [reported as: Chenopodium anthelminticum L.]
- Fit plant 1898-1913 (5, 49)
- Monotropa uniflora L.
- Fitch 1876 (92)
- Vicia sativa L.
- Fit-root [Fit root, Fitroot] or Fit-root plant [Fit root plant]1828-1913 (5, 6, 7, 92, 156, 158)
- Monotropa uniflora L.
- Five-angle dodder [Fiveangled dodder]
- Present (50)
- Cuscuta pentagona Engelm.
- Present (50)
- Cuscuta pentagona Engelm. var. pentagona
- Five-finger [Five finger]
- 1896-1929 (76, 157, 158)
- Parthenocissus quinquefolia (L.) Planch. [also reported as: Ampelopsis quinquefolia Michx.]
- 1895-1949 (1, 2, 82, 93, 109) IA Neb
- Potentilla L.
- 1928 (40)
- Potentilla arguta Pursh ssp. arguta [reported as: Drymocallis arguta (Pursh) Rydb.]
- 1913-1930 (80, 82) IA
- Potentilla norvegica L. ssp. monspeliensis (L.) Aschers. & Graebn. [also reported as: Potentilla monspeliensis L.]
- Five-finger creeper [Five-fingered creeper] 1923 (156)
- Parthenocissus quinquefolia (L.) Planch. [reported as: Ampelopsis quinquefolia Michx.]
- Five-finger ivy [Five-fingered ivy] 1893-1923 (74, 156, 158) NY
- Parthenocissus quinquefolia (L.) Planch. [also reported as: Ampelopsis quinquefolia Michx.]
- Five-fingers [Five fingers] 1828-1929 (6, 7, 64, 156, 157, 158)
- Panax quinquefolius L. [also reported as: Aralia quinquefolia Gray, possibly P. quinquefolia ]
- Five-fingers root [Fivefingers root] 1876 (92)
- Panax quinquefolius L. [reported as: Panax quinquefolium L.]
- Five-hook bassia [Fivehook bassia] 1942-1986 (4, 155)
- Bassia hyssopifolia (Pallas ) Kuntze
- Five-horn smotherweed [Fivehorn smotherweed] Present (50)
- Bassia hyssopifolia (Pallas ) Kuntze
- Five-leaf creeper [Five-leaved creeper] 1879 (46)
- Parthenocissus quinquefolia (L.) Planch. [reported as: Ampelopsis quinquefolia Michx.]
- Five-leaf ivy [Five-leaved ivy] 1895-1923 (130, 156, 158)
- Parthenocissus quinquefolia (L.) Planch. [also reported as: Ampelopsis quinquefolia Michx., Parthenocissus quinque-folia (L.) Planch.]
- Five-leaves 1876-1892 (6, 49, 92)
- Parthenocissus quinquefolia (L.) Planch. [also reported as: Ampelopsis quinquefolia Michx.]
- Five-nerve false sunflower [Five-nerved false sunflower] 1899-Present (50, 131)
- Helianthella quinquenervis (Hook.) Gray
- Five-nerve helianthella [Fivenerve helianthella] Present (50)
- Helianthella quinquenervis (Hook.) Gray
- Five-sisters [Five-sisters] 1900-1923 (5, 156, 158)
- Lysimachia quadrifolia L.
- Five-spike blue grama [Fivespike blue grama] 1942 (155)
- Bouteloua gracilis (Willd. ex Kunth) Lag. ex Griffiths [reported as: Bouteloua gracilis stricta (Bouteloua gracilis Vasey in Rothr. var. stricta Hitchc.)]
- Five-stamen chickweed [Fivestamen chickweed] Present (50)
- Cerastium semidecandrum L.
- Five-stamen cinquefoil [Five-stamened cinquefoil, Five stamened cinquefoil] 1907-1936 (5, 72, 93)
- Potentilla rivalis Nutt. var. pentandra (Engelm.) S. Wats. [also reported as: Potentilla pentandra Engelm.]
- Five-stamen mouse-ear chickweed [Five-stamened mouse-ear chickweed] 1913 (5)
- Cerastium semidecandrum L.
- Five-stamen tamarisk [Fivestamen tamarisk] or Fivestamen tamarix 1923-Present (50, 138, 155)
- Tamarix chinensis Lour. [also reported as: Tamarix pentandra Pallas]
- Flachs or flax (Teutonic, from old German flahs) 1886 (110)
- Linum usitatissimum L.
- Flachskraut (German) 1900 (158)
- Linaria vulgaris P. Mill. [reported as: Linaria linaria (L.) Karst.]
- Flack (Swedish) 1879 (46)
- Phalaris arundinacea L.
- Flag
- 1818 (10)
- Iris L.
- 1939 (148) CO
- Iris missouriensis Nutt.
- 1806-1811 (27, 35) Ordway
- Typha latifolia L. [also reported as: Typha palustris]
- Flag lily [Flag-lilly, Flag-lily]
- 1828-1923 (7, 156)
- Iris L.
- 1892-1929 (5, 6, 49, 64, 92, 156, 157, 158)
- Iris versicolor L.
- Flag root [Flag-root] 1828-1936 (5, 7, 93, 156, 157)
- Acorus calamus L.
- Flagons 1900-1923? (5, 156, 158) obsolete by 1923
- Iris pseudacorus L.
- Flag-tule 1929 (157)
- Typha latifolia L.
- Flambe varié or Flambe variée (French) 1800? (158)
- Iris versicolor L.
- Flame lily 1900-1923 (5, 156, 158)
- Lilium philadelphicum L.
- Flameflower [Flame flower, Flame-flower]
- 1936-1949 (93, 109)
- Talinum Adans.
- 1937 (122) TX
- Talinum aurantiacum Engelm.
- Flameleaf sumac 1942-Present (50, 155)
- Rhus copallinum L. [also reported as: Rhus copallina L. (sic)]
- Flaming orchis 1913-1923 (5, 156)
- Platanthera psycodes (L.) Lindl. [also reported as: Blephariglottis psycodes (L.) Rydb., Habenaria psycodes Spreng.]
- Flamy 1900 (158)
- Viola tricolor L.
- Flannel mullein 1942 (155)
- Verbascum thapsus L.
- Flannel plant [Flannel-plant] 1892 (6, 156)
- Verbascum thapsus L.
- Flannel-flower [Flannel flower] 1876 (92)
- Verbascum thapsus L.
- Flannel-leaf [Flannel-leaf] 1900-1923 (5, 69, 156, 158)
- Verbascum thapsus L.
- Flapdock 1904 (69)
- Digitalis pupurea L.
- Flat peach 1949 (109)
- Prunus persica (L.) Batsch [reported as: Prunus persica (L.) Batsch var. compressa Bean (Amygdalus persica L.)]
- Flat-globe dodder [Flatglobe dodder] Present (50)
- Cuscuta umbellata Kunth
- Flat-leaf bladderwort [Flatleaf bladderwort, Flat-leaved bladderwort] 1907-Present (5, 50, 72)
- Utricularia intermedia Hayne
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